LCD L34538 vs. L33393: which applies to your patient, and why it matters at audit

Nobody tells you there are two LCDs. You learn L34538 because it's the one in the training materials, the one your DON references, the one everyone means when they say "the LCD." L33393 comes up later — usually when a patient doesn't fit cleanly into one category and someone asks, "which LCD do we use for this one?"

The answer matters, because using the wrong one — or trying to squeeze a patient into L34538 when L33393 fits better — creates exactly the documentation gaps that ADR reviewers exploit.

The difference in one sentence

LCD L34538 is disease-specific. It covers dementia, cardiac disease, pulmonary disease, cancer, liver disease, renal disease, ALS, stroke, and HIV — and each has its own eligibility criteria. LCD L33393 is non-disease specific. It covers patients whose terminal prognosis is driven by overall functional and nutritional decline rather than a single dominant diagnosis.

Both require the same six-month prognosis standard. They just build the case differently.

When L34538 is the right choice

Use L34538 when the patient has a clearly dominant terminal diagnosis that maps to one of the covered categories, and you can document that disease's specific criteria with actual numbers.

For cardiac: EF ≤ 20% — not EF 30%, not "low EF" — or documented symptoms at rest despite maximal therapy. For pulmonary: dyspnea at rest or two or more ER visits for exacerbation, plus SpO2 ≤ 88% on room air. For dementia: FAST 7A or beyond plus a secondary condition. These aren't impressions — they're specific thresholds. If your patient's numbers hit them, document under L34538 and document to those criteria precisely.

If they don't hit the thresholds — if the EF is 35%, if the SpO2 is 91%, if the FAST is 6E — documenting under L34538 for that diagnosis creates a vulnerability even if the patient is genuinely terminal.

When L33393 is the right choice

Use L33393 when no single diagnosis drives the terminal picture — the patient with CHF, COPD, and mild dementia, all contributing, none dominant. Or the patient with advanced frailty and failure to thrive where the underlying mechanism isn't a single disease. Or the patient whose primary diagnosis doesn't appear in L34538's covered categories at all.

L33393 builds the eligibility case from a combination of functional and nutritional indicators:

Nutritional impairment: BMI ≤ 22, weight loss ≥ 10% in 6 months, albumin ≤ 2.5 g/dL, or dysphagia with documented oral intake compromise. Functional decline: dependence in three or more ADLs, PPS ≤ 50%. Symptom burden and treatment trajectory: intractable symptoms despite optimized management, recurrent infections, ER visits or hospitalizations, documented refusal of further disease-directed treatment.

The more of these indicators are present and documented, the stronger the L33393 case. You typically need multiple — not one.

The audit risk of defaulting to L34538

Many agencies document every patient under L34538 because it's the familiar one. The problem surfaces when the disease-specific criteria aren't actually met. A chart that says "cardiac disease, LCD L34538" with an echo showing EF 38% and no documented rest symptoms is exactly what ADR reviewers pull for denial. The diagnosis code says cardiac. The LCD criteria for cardiac aren't in the record. Vulnerable.

For that same patient, a chart documenting under L33393 — PPS 40, three-ADL dependence, 11% weight loss in 5 months, two ER visits for decompensation, declining nutritional intake — is often significantly more defensible. The clinical picture is the same. The documentation strategy makes the difference.

The practical decision

Does the patient have a clearly dominant diagnosis, and do their actual clinical numbers satisfy that diagnosis's L34538 criteria? If yes, document under L34538 to those specific criteria. If no — if the criteria aren't clearly met, or if the picture is multi-factorial — document under L33393 and build the functional/nutritional case. Don't try to force L34538 on a patient who fits L33393 better. The chart will show it.